When a drone recognizes a human gesture through one of its sensors, it will process it against a database of gestures then respond accordingly.

One example explains how a humans waving their arms "in a shooing manner" could signal to the drone not to move any further, causing the vehicle to adjust its speed or trajectory.

"On the other hand, the human recipient may wave his arms in an inviting manner as the vehicle approaches," reads an excerpt from the patent. "This may be interpreted by the vehicle as an instruction to land and deliver the package."